55422820 has 12 divisors (see below), whose sum is σ = 116387964. Its totient is φ = 22169120.

The previous prime is 55422817. The next prime is 55422883. The reversal of 55422820 is 2822455.

It can be written as a sum of positive squares in 2 ways, for example, as 9535744 + 45887076 = 3088^2 + 6774^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1385551 + ... + 1385590.

It is an arithmetic number, because the mean of its divisors is an integer number (9698997).

Almost surely, 2^55422820 is an apocalyptic number.

It is an amenable number.

55422820 is an abundant number, since it is smaller than the sum of its proper divisors (60965144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55422820 is a wasteful number, since it uses less digits than its factorization.

55422820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2771150 (or 2771148 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 55422820 is about 7444.6504283277. The cubic root of 55422820 is about 381.2672832799.

The spelling of 55422820 in words is "fifty-five million, four hundred twenty-two thousand, eight hundred twenty".